Pneumatic dispatch carrier



Oct. ll, 1927. E' CBgNGEL- PNEUMATIC DISPATCH CARRIER Filed Sept. 9. 1926 4 5 Q7 Z Ig..

4 5 2 L /0 o 73 f ,.9 @y /wUgL clzvard O15 engel Patented Oct. 11, 1927.

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EDWARD C. BENGEL, OF ST. LOUIS, MISSOURI, ASSIG'NOR TO THE IIAMSYON COMPANY, OF SYRACUSE, NEW YORK, A CORPORATION `0I? MASSACHUSETTS.

`runUivrA'rrc DISPATCH Giannina. ,A

Application filed September 9, A1926. Serial 310,134,398.

This invention relates `to carriers for pneumatic dispatch systems and more particularly to carriers of the so-called takeapart type, such as disclosed in the patent to James G. Maclaren No. 1,553,859, Sep tember 15, 1925. Carriers of this type coinprise inner and outer telescoping shells, each shell having a fixed head at one end. Access'to the interior is ordinarily obtained by rotating the shells relatively to one another whereby to bring the openings'in the respective shells into registry, but for certain reasons, for example, to position or remove index slips disposed between the meeting surface of the shells, it is desirable at times to separate the shells by relative axial movement. However, this axial movement isl usually undesirable and to prevent accidental separation during transmission or handling of the carrier, a stop pin is provided on one shell which engages an abutment element on the other.

In the carrier disclosed in the above patent the abutmentis `provided at one point with a passage through which the stop pin may be moved to permit separation of the shells when desired and although the stop pin and abutment ordinarily and for most purposes avoid the danger of accidental separation of the shells, the provision f the aforesaid' channel makes vsuch accidental separation at least theoretically possible and for this reason users of pneumatic dispatch carriers sometimes object to this 'type of carrier.

In accordancev with the present invention I provide a safety device applicable to carriers of the above type and which positively prevents accidental separation ofthe shells although permitting intentional separation when desired.

In the accompanying drawings Fig. 1 is a side elevat-ion of a take-apart carrier of the type referred to, showing the inner and outer shellsrelatively positioned to give access'to the interior;

Fig. 2 is a sideelevation lof the same car# rier, but with the shells separated and axially aligned to show details of construction ofthe inner shell; f

Fig. 3 is a fragmentary radial section to large scale showing the shells assembled and the safety device in place;

Fig. 4 is aV fragmentarysection substantially on the linef4f`-4 of Fig. 3; and

Fig. 5 is a section similar to Fig. 3 but illustrating a modified form of the safety device.

Referring to the drawings the numeral l rdesignatfkes the inner Vcylindrical shell of the carrier, such shell kbeing provided with a head 2 at itsouterA end. In this type' of carrier the head is usually permanently,

of rivets, not shown.

The outer shell 3 is also provided at its outer end with a non-removable y,head 4, "and is furnished' with the usual driving washer 5 adapted tolmake air-tight contactwith the iner surface ofthe pneumatic transmission tu e.' l

`'The inner shell v1 is furnishedwith an elongate access opening 6 in its Wall,A such opening being adapted to register with a corresponding access opening 7 in thel wall' ofthe outer shell 3 when the shells `are turned to the proper relative position'as shown in Fig.` f c. i i

Theinnerv end ofthe access .opening 6 in the shell is defined by kan axially'narrowlportion 1a of the shellhereinafter,referred to as4 the abutment member. This abutment member is furnished with a shallow, axially extending V channel 8, as described in Vthe aforesaid patent, .such` channel extending from the edge 10 of the abutment member 1a to the inner endof 10a' of the shell, This channel may conveniently rbe Vformed lby pressing the metal of the shell inwardly during the process of manufacture. While the channel 'is here Ashown as substantially straightan'd parallel to the axis of the'shell, it is: contemplated that the channel might bevof zig-zag or curved form, or oblique to the axis if desired.

The channel 8 forms a passage for vthe headv 9 of a stoppin projecting inwardly from the wall ofthe outerk shell 3. This stop pin mayconveniently consist of'a rivet inserted at this point, the inner head 9 o'f the rivet preferably` being flattened topermit it to pass readily through the channel 8.

,When the parts arey assembled the head'9 of this pin normally engages the edge 10 of the abutmentmember 1a and thus prevents relatively axial movement lof the shells. However when the shells are turned to, one predetermined relative position, wherein the pin 9 is opposite the end of the channel 8, the shellsm'ay be separated by relatively attached'to the shell, for example, by means f axial movement, all as described in the aforesaid patent. To prevent such separation accidentally the safety device hereinafter described is provided.

This safety device as shown in Figs. 3 and 4 consists of a strip of sheet material, preferably somewhat resilient metal, benty substantially into U-form and comprising the legs 13 and 14. The leg 13 is adapted to be slipped endwise into the recess or channel 8 between the surfaces of the shells. The interposition of this clip between the head 9 of the stop pin and the edge of the abutment 1a prevents the pin from entering the channel andthus prevents accidental separation ol the shells. The other leg 14 of the clip is disposed at the inner surface of the abutment 1a and provides a convenient handle for manipulation of the clip in insortingr or withdrawing the latter.

While the resiliency of the clip may be relied upon to retain it in position, particularly if the inner leg 13 be deflected slightly from fastraight line as shown, it is preferred to Vprovide more certain retaining means. For example, by depressing the metal of the abutment 1a at a point intermediate the ends of'the channel I provide a recess 16 adapted to receive a projection or boss 17 on the leg 13. When the clip is slipped into place theA metal of theabutment 1a springs suiliciently to permit the boss 17 to pass the narron7 part of the channel and to snap into the recess .16. Thev clip `is thus retained in assembled relation until Withdrawn by the application of considerable force to the handle portion 14.

In Fig. 5 a modified form of clip is disclosed, such clip 18 consisting of a substan f tially straight piece of metal having the boss 19 adapted to snap into the recess 16 of the abutment. When this type of clip 'is once inserted it is more difficult to remove since it is not provided with a handle and inav thus be employed if itis desired to connect the Shells so as permanently to eliminate the take-apart character of the carrier.

By the employment of the clip `shown in Figs. 3 and 4C, it is possible positively to prevent accidental separation of the shells, regardless of their rel-ativeposition of rotation, .although if it be desired at any time to separate the shells thee-lip may readily be Withdrawn andthe :shells relatively rotated to bring the stop pin into registry with the channel 8. a

Vlfhile certain desir-able forms of safety device have herein been disclosed it is to be understood that in its broader aspects `the invention is not limited to. this particular embodiment but'that other and equivalent arrangements may be .substituted .therefor as circumstances may demand..

I claim:

1.*.A pneumatic dispatch carrier of takeapart type having relatively rotatable telescoping shells, said shells being separable by relative axial movement when relatively rotated to a predetermined position, and a resilient clip adapted to be interposed between elements of the respective shells to prevent relative axial movement ot the shells When in said predetermined position.

2. A pneumatic dispatch carrier comprising telescoping shells, a stop member projecting from one shell, an abutment element on the other shell, said abutment having a channel through which the stop member may pass to permit axial separation of the shells, and means for obstructing said channel.

3. A pneumatic dispatch carrier of take apart type having telescoping shells, said shells ybeing separable by relative axial movement, and a removable stop adapted to be seated in a recess in one shell and by its interposition between elements of the respective shells to prevent relative axial movement of the shells.

4. A pneumatic dispatch carrier of take apart type having telescoping shells, said shells being separable by relative axial movement, one of the shells having a depression in its Wall providing an elongate recess between it vand the Wall of the other shell, and a clip adapted to be slid into said recess and when seated therein to prevent relative axial movement of the shells.

5. A pneumatic dispatch carrier comprising relatively rotatable telescoping shells, a rigid stop lug projecting from one shell and normally engaging La part of the second shell to prevent relative .axial movement of the shells, the part with which the stop-lug eff gages having an axially extending channel through which the stop lug may pass when the shells occupy one predetermined relative position, andmeans for closing said channel.

6. A pneumatic 4dispatch carrier having telescoping shells, the inner end of one shell having an axially narrow circumferentiaily extending abutment member provi-ded With Va channel extending from one edge to the other, a projection upon the inner portion of the other shell normally engaging the abutment member but capable of movement through said channel to permit axial sepa-A ration oi' the shells, and a removable clip for obstructing said channel, said clip and the abutment member having cooperating elements for retaining the clip in operative position in the channel.

i?. A pneumatic dispatch carrier of talreapart type havingr telescoping shells, said shells being separable by relative axial move men-t, and a U-shaped retaining clip of sheetl material, one leg of said clip being adapted to be interposed between elements of the respective shells and the other leg of the 4clip constituting -a handle for manipulating it.

8. A pneumatic dispatch carrier comprising telescoping shells, a stop member pro jecting from one shell engaging an abutment element of the other shell normally to prevent relative axial movement of the shells, said abutment having a Way therethrough adapted to permit the passage of the stop and the axial separation of the shells, and means for obstructing said Way comprising a clip having a portion fitting Within the channel and a handle portion projecting beyond the channel and constituting means for removing the clip.

9. A pneumatic dispatch carrier having ytelescoping shells each having an access opening in its peripheral Wall, the inner end of the access opening of one shell being defined by the edge of a circumferentially extending abutment member, the abutment member having a channel extending from the access opening to the inner end of the shell, a projection carried by the other kshell normally engaging the edge of the abutment but capable of moving through the channel to permit axial separation of the shells, and a removable clip for obstruct-ing the channel, said clip having a boss engageable With a recess inthe Wall of the channel to prevent accidental removal of the clip.

10'. A pneumatic dispatch carrier comprising telescoping shells, a stop member projecting from one shell, the other shell having an abutment with which said stop member normally engages, said abutment having a passage through which the stop member may be moved to permit axial separation of the shells, and a substantially U-shaped clip, one leg of Which may be seated in the passage in the abutment to prevent movement of the stop member along said passage, the other leg of the clip being exposed and constituting means for removing the clip from operative position.

Signed by me at St. Louis, Missouri, this 28th day' of August, 1926.

EDWARD C. BENGEL.

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